Water filter



FIG. 1 is a perspective view;

FIG. 2 is a front view;

FIG. 3 is a back view;

FIG. 4 is a side view;

FIG. 5 is a side view similar to FIG. 4 except rotated 180 degrees;

FIG. 6 is a top view; and,

FIG. 7 is a bottom view. 

The ornamental design for a water filter, as shown and described. 